CN219648720U - Vertical and horizontal two-type lathe tool for tail rotor connecting piece - Google Patents

Abstract

The utility model belongs to the field of tool fixtures, relates to machining of key parts of a helicopter, and particularly relates to a vertical and horizontal two-type lathe tool for a tail rotor connecting piece. The fixture comprises a flange plate, a fixture body, a positioning plate, a cylindrical positioning pin, a diamond positioning pin and a limiting block; the fixture body is connected with the flange plate through countersunk screws, the fixture body is connected with a positioning plate through screws, and a cylindrical positioning pin and a diamond positioning pin are arranged on the positioning plate and used for positioning a workpiece; the clamping surface of the clamp body is matched with the appearance of the workpiece, two positioning bosses are arranged on the clamp body and the positioning plate, and the tensioning screw A passes through the boss of the positioning plate and the tensioning screw B passes through the boss of the clamp body to realize tensioning and fixing. The tool disclosed by the utility model is suitable for vertical and horizontal lathes, has low gravity center, has good dynamic balance characteristic, and is more stable in turning.

Description

Vertical and horizontal two-type lathe tool for tail rotor connecting piece

Technical Field

The utility model belongs to the field of tool fixtures, relates to machining of key parts of a helicopter, and particularly relates to a vertical and horizontal two-type lathe tool for a tail rotor connecting piece.

Background

The tail rotor connecting piece is used as a key part for connecting the tail rotor hub and the tail rotor blade, directly influences the heading maneuvering performance of the helicopter, and generally adopts titanium alloy materials in order to meet the performance requirements on long service life, light structure and the like. However, the titanium alloy has low self elastic modulus, large elastic deformation, high cutting temperature, low heat conductivity coefficient and high chemical activity at high temperature, so that the cutting processing efficiency is low and the performance is poor.

Difficulty in tail rotor connector part processing: the profile size is complex, the groove cavity is deep, the large fork lugs are thin in wall and have an oblique angle theoretical profile, the material removal rate is as high as more than 80% during numerical control machining, and the cycle of single machining beat is long; the characteristics of thin wall, fork ear, deep groove cavity and the like account for more than 80 percent, and the structure is a typical weak rigid structure, and the processing state is extremely unstable. The part has a complex structure, high requirements on shape coordination, and strict aperture tolerance, surface quality and form and position tolerance. In particular, the elastic bearing mounting hole of the part needs to be provided with an inner and outer circle turning and a reverse drawing inner cavity, the precision is high, clamping is difficult, and the processing quality is unstable. Therefore, how to ensure stable clamping and reduce clamping stress, meet turning precision and surface quality thereof, and improve quality stability of product batch production is a technical problem to be solved.

Disclosure of Invention

In the past, turning processing of the tail rotor connecting piece parts can be basically only performed on a horizontal lathe, and the parts need to be frequently adjusted for centering the outer circle of the end face, so that the clamping efficiency is extremely low; and the structural rigidity of the part is weak, and the pressing force directly acts on the part body, so that clamping deformation is very easy to occur, and the surface quality of the reverse drawing inner cavity is not ideal. In order to meet the requirements of various lathe processing as much as possible, reduce the clamping deformation of parts, improve the clamping efficiency and the stability of the clamping efficiency, and particularly provide a practical, effective and quick lathe tool suitable for the vertical and horizontal general use of the parts.

Unlike conventional machining process, the fixture of the present utility model has pressing force acting on the part, and the fixture can reduce the pressing deformation to the greatest extent. Secondly, the fixture uses a cylindrical locating pin and a diamond locating pin to directly align a part coordinate system, and uses blind nails to screw up, so that the clamping of the part is more convenient and simple, and the clamping and aligning efficiency of the part is greatly improved; and after one-time part machining is successful, the subsequent parts do not need to be aligned with a coordinate system and carry out cutter compensation, so that the labor intensity of operators is greatly reduced, and the quality stability of product batch production is improved while the dimensional accuracy is met.

Technical proposal

A vertical and horizontal two-type lathe tool for a tail rotor connecting piece comprises a flange plate 1, a clamp body 2, a positioning plate 4, a cylindrical positioning pin 5, a diamond positioning pin 6 and a limiting block 7; the fixture body 2 is connected with the flange plate 1 through countersunk screws, the fixture body 2 is connected with a positioning plate 4 through screws, and the positioning plate 4 is provided with a cylindrical positioning pin 5 and a diamond positioning pin 6 for workpiece positioning; the clamping surface of the clamp body 2 is matched with the appearance of a workpiece, two positioning bosses are arranged on the clamp body 2 and the positioning plate 4, and a tensioning screw A13 passes through the boss of the positioning plate 4 and a tensioning screw B15 passes through the boss of the clamp body 2 to realize tensioning and fixing. The limiting block 7 is arranged on the working surface of the clamp body 2, and parts abut against the positioning plate 4 and the limiting block 7 to finish positioning and clamping.

The anti-error pin 3 is arranged on the clamping surface of the clamp body 2.

The novel clamping device further comprises rib plates 8, wherein the rib plates 8 are arranged on two sides of the clamping body 2 and are respectively connected with the clamping body 2 and the flange plate 1 through screws.

The novel flange plate further comprises a balancing weight 9, and the balancing weight 9 is arranged on the flange plate 1 through a hexagonal screw 10.

The clamp further comprises a hanging ring 11, and the hanging ring 11 is arranged on the hanging surface of the clamp body 2.

The number of the hanging rings 11 is 4.

The clamp further comprises an enlarged washer A12 and an enlarged washer B14, wherein the enlarged washer A12 and the enlarged washer B14 are respectively arranged between the clamp body 2 and the tensioning screw A13 and the tensioning screw B15.

Technical effects

1. The tool disclosed by the utility model is applicable to vertical and horizontal lathes, has low gravity center, has good dynamic balance characteristic, and is more stable in turning;

2. unlike conventional machining process, the fixture of the present utility model has pressing force acting on the part, and the fixture can reduce the pressing deformation to the greatest extent.

3. The fixture uses the cylindrical locating pin and the diamond locating pin to directly align the coordinate system of the part, and uses the blind rivet to screw up, so that the clamping of the part is more convenient and simple, and the clamping alignment efficiency of the part is greatly improved.

4. After the primary part is successfully processed, the subsequent parts do not need to be aligned with a coordinate system and compensated by a cutter, so that the labor intensity of operators is greatly reduced, and the quality stability of batch production is improved.

Drawings

FIG. 1 is a schematic diagram of a structure;

FIG. 2 is a rear elevational view of the structure;

FIG. 3 is a structural perspective view;

wherein: the flange plate 1, the fixture body 2, the error-proofing pin 3, the locating plate 4, the cylindrical locating pin 5, the diamond locating pin 6, the limiting block 7, the rib plate 8, the balancing weight 9, the hexagonal screw 10, the hanging ring 11, the enlarged washer A12, the tensioning screw A13, the enlarged washer B14 and the tensioning screw B15.

Detailed Description

The utility model is further described below with reference to examples. The following description is of some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The vertical and horizontal two-type lathe tool for the tail rotor connecting piece comprises a flange plate 1, a clamp body 2, a positioning plate 4, a cylindrical positioning pin 5, a diamond positioning pin 6 and a limiting block 7; the fixture body 2 is connected with the flange plate 1 through countersunk screws, the fixture body 2 is connected with a positioning plate 4 through screws, and the positioning plate 4 is provided with a cylindrical positioning pin 5 and a diamond positioning pin 6 for workpiece positioning; the clamping surface of the clamp body 2 is matched with the appearance of a workpiece, two positioning bosses are arranged on the clamp body 2 and the positioning plate 4, and a tensioning screw A13 passes through the boss of the positioning plate 4 and a tensioning screw B15 passes through the boss of the clamp body 2 to realize tensioning and fixing. The limiting block 7 is arranged on the working surface of the clamp body 2, and parts abut against the positioning plate 4 and the limiting block 7 to finish positioning and clamping.

Further, the anti-mistake pin 3 is further included, and the anti-mistake pin 3 is arranged on the clamping surface of the clamp body 2 to prevent the workpiece from being reversely assembled;

further, the novel clamping device also comprises rib plates 8, wherein the rib plates 8 are arranged on two sides of the clamping body 2 and are respectively connected with the clamping body 2 and the flange plate 1 through screws; stability is enhanced.

Further, still include balancing weight 9, balancing weight 9 passes through hexagonal screw 10 to be set up on ring flange 1, sets up balancing weight 9 in order to guarantee behind the clamping work piece focus on the axis of ring flange 1.

Further, the lifting ring 11 is arranged on the lifting surface of the clamp body 2, and the tool is used for lifting when the tool is aligned.

Furthermore, the number of the hanging rings 11 is 4, which accords with the practical requirement of the working environment and is more beneficial to balance.

Further, the clamp further comprises an enlarged gasket A12 and an enlarged gasket B14, wherein the enlarged gasket A12 and the enlarged gasket B14 are respectively arranged between the clamp body 2 and the tensioning screw A13 and the tensioning screw B15, and the clamp body 2 is provided with larger hole gaps, and the enlarged gasket A12 and the enlarged gasket B14 play a role in stabilizing.

The overall scheme is as follows: through the alignment ring flange excircle, use countersunk head bolt to fix frock on vertical or horizontal lathe swivel work head, pack the pilot hole that the part reserved into cylinder locating pin and diamond locating pin again, screw in the part technology bench screw hole from the frock back at last with the tensioning screw, make the part close to locating plate and stopper, can accomplish location clamping, then carry out turning.

1. Aligning the outer circle of the flange plate, enabling the center of the tool to coincide with the turning center of the lathe, and fixing the tool on a lathe workbench through a countersunk hole in the flange plate by using countersunk bolts;

2. firstly, extending one end of a large fork opening of a part into a tool, and installing a reserved process hole of the part into a cylindrical positioning pin and a diamond positioning pin to limit the degree of freedom of a workpiece except for the X direction; after the installation direction and the front and back sides are determined to be in accordance with the clamping positions, taking out the error-proof pins;

3. then, the part is tapped by a wooden hammer, after no clearance between the part and the locating plate and between the part and the limiting block is confirmed, 4 tightening screws are screwed in from the back of the tool, and after the tightening screws are pre-tightened by hands, the tightening screws are sequentially screwed by a spanner, so that the part is firmly fixed on the tool;

4. finally, pre-aligning the turning tool on the end surface of the rib plate, roughly turning, measuring relevant dimensions, and compensating the length and the radius of the turning tool to finish final finish machining; and when the next part is turned, the numerical control program can be directly operated without aligning a coordinate system and compensating a cutter.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. While the foregoing is directed to embodiments of the present utility model, other and further details of the utility model may be had by the present utility model, it should be understood that the foregoing description is merely illustrative of the present utility model and that no limitations are intended to the scope of the utility model, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the utility model.

Claims (7)

1. The vertical and horizontal two-type lathe tool for the tail rotor connecting piece is characterized by comprising a flange plate (1), a clamp body (2), a positioning plate (4), a cylindrical positioning pin (5), a diamond positioning pin (6) and a limiting block (7); the fixture body (2) is connected with the flange plate (1) through countersunk screws, the fixture body (2) is connected with a positioning plate (4) through screws, and the positioning plate (4) is provided with a cylindrical positioning pin (5) and a diamond positioning pin (6) for workpiece positioning; clamping shape face and the work piece appearance assorted of anchor clamps body (2), all be equipped with two location bosss on anchor clamps body (2) and locating plate (4), take-up screw A (13) pass the boss of locating plate (4), take-up screw B (15) pass the boss of anchor clamps body (2) and realize taut fixed, be equipped with stopper (7) on the working face of anchor clamps body (2), the part is in close proximity to locating plate (4) and stopper (7), accomplishes location clamping.

2. The vertical and horizontal lathe tool for the tail rotor connecting piece according to claim 1, further comprising an error-proofing pin (3), wherein the error-proofing pin (3) is arranged on a clamping-shaped surface of the clamp body (2).

3. The vertical and horizontal lathe tool for the tail rotor connecting piece according to claim 1, further comprising rib plates (8), wherein the rib plates (8) are arranged on two sides of the clamp body (2) and are respectively connected with the clamp body (2) and the flange plate (1) through screws.

4. The vertical and horizontal lathe tool for the tail rotor connecting piece according to claim 1, further comprising a balancing weight (9), wherein the balancing weight (9) is arranged on the flange plate (1) through a hexagon screw (10).

5. The vertical and horizontal lathe tool for the tail rotor connecting piece according to claim 1, further comprising a hanging ring (11), wherein the hanging ring (11) is arranged on the hanging surface of the clamp body (2).

6. The vertical and horizontal lathe tool for the tail rotor connecting piece according to claim 5, wherein the number of the hanging rings (11) is 4.

7. The vertical and horizontal lathe tool for the tail rotor connecting piece according to claim 1, further comprising an enlarged washer A (12) and an enlarged washer B (14), wherein the enlarged washer A (12) and the enlarged washer B (14) are respectively arranged between the clamp body (2) and the tensioning screw A (13) and the tensioning screw B (15).